HTC Peep cooked, served a l'orange by Twitter's new authentication scheme (update: fixed?)

It's been known for some time that Twitter would be moving away from basic authentication to OAuth for third-party apps; in fact, they'd already officially pushed back the drop-dead switchover date once to mid-August before finally pulling the plug this week. Be that as it may, it makes sense that a bunch of lesser-known, less-maintained apps would fall by the wayside once the old security mechanism got shut down -- but HTC's Peep? Really? Sure enough, we've been able to confirm on our own Desire that the Twitter app HTC bundles with its Sense UI for Android is no longer working this morning, giving users an "incorrect username or password" error when they try to connect. We're not sure if they'll be able to fix this with a Market update across the board or if it'll take a bunch of firmware updates to get everyone back on the up and up, but either way, something tells us Twitter isn't going to flip the switch back on for these guys.

Update: We can't say for certain whether Peep's working properly now, a few days later, but our Froyo-filled Droid Incredible (and those of several tipsters) seem to be displaying tweets just fine, and Twitter itself reports that it recently fixed an issue with Peep, Moto Blur and a variety of other third-party Twitter clients.